<html lang="en">

<head>
  <meta charset="UTF-8">
  <meta http-equiv="X-UA-Compatible" content="IE=edge">
  <meta name="viewport" content="width=device-width, initial-scale=1.0">
  <title>颜色分类, 按照红色(0)、白色(1)、蓝色(2)顺序排列</title>
</head>

<body>
  <script>
    var arr = [2, 1, 2, 0, 1, 2, 2, 1, 1, 0, 0, 1, 2, 0, 1]
    for (var i = 0; i < arr.length; i++) {
      for (var j = 0; j < arr.length; j++) {
        if (arr[j] > arr[j + 1]) {
          [arr[j], arr[j + 1]] = [arr[j + 1], arr[j]]
        }
      }
    }
    console.log(arr)
  </script>
</body>

</html>